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Finding the Fourth Proportional to 199.28, 275.25 and 143.93

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Solution

The fourth proportional to 199.28, 275.25 and 143.93 is: 198.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.28 : 275.25 = 143.93 : x
  2. Step 2: Convert to fraction form
    199.28/275.25 = 143.93/x
  3. Step 3: Cross multiply
    199.28x = 275.25 × 143.93
  4. Step 4: Simplify right side
    199.28x = 39,615.60
  5. Step 5: Solve for x
    x = 39,615.60/199.28
  6. Step 6: Final answer
    x = 198.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.